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/*
* natfeat.c - ARAnyM hardware support via Native Features (natfeats)
*
* Copyright (c) 2005 Petr Stehlik of ARAnyM dev team
*
* Reworked for Linux by Roman Zippel <zippel@linux-m68k.org>
*
* This software may be used and distributed according to the terms of
* the GNU General Public License (GPL), incorporated herein by reference.
*/
#include <linux/types.h>
#include <linux/console.h>
#include <linux/string.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/io.h>
#include <asm/machdep.h>
#include <asm/natfeat.h>
asm("\n"
" .global nf_get_id,nf_call\n"
"nf_get_id:\n"
" .short 0x7300\n"
" rts\n"
"nf_call:\n"
" .short 0x7301\n"
" rts\n"
"1: moveq.l #0,%d0\n"
" rts\n"
" .section __ex_table,\"a\"\n"
" .long nf_get_id,1b\n"
" .long nf_call,1b\n"
" .previous");
EXPORT_SYMBOL_GPL(nf_get_id);
EXPORT_SYMBOL_GPL(nf_call);
static int stderr_id;
static void nf_write(struct console *co, const char *str, unsigned int count)
{
char buf[68];
buf[64] = 0;
while (count > 64) {
memcpy(buf, str, 64);
nf_call(stderr_id, buf);
str += 64;
count -= 64;
}
memcpy(buf, str, count);
buf[count] = 0;
nf_call(stderr_id, buf);
}
void nfprint(const char *fmt, ...)
{
static char buf[256];
va_list ap;
int n;
va_start(ap, fmt);
n = vsnprintf(buf, 256, fmt, ap);
nf_call(nf_get_id("NF_STDERR"), buf);
va_end(ap);
}
static struct console nf_console_driver = {
.name = "debug",
.write = nf_write,
.flags = CON_PRINTBUFFER,
.index = -1,
};
static int __init nf_debug_setup(char *arg)
{
if (strcmp(arg, "emu"))
return 0;
stderr_id = nf_get_id("NF_STDERR");
if (stderr_id)
register_console(&nf_console_driver);
return 0;
}
early_param("debug", nf_debug_setup);
static void nf_poweroff(void)
{
long id = nf_get_id("NF_SHUTDOWN");
if (id)
nf_call(id);
}
void nf_init(void)
{
unsigned long id, version;
char buf[256];
id = nf_get_id("NF_VERSION");
if (!id)
return;
version = nf_call(id);
id = nf_get_id("NF_NAME");
if (!id)
return;
nf_call(id, buf, 256);
buf[255] = 0;
pr_info("NatFeats found (%s, %lu.%lu)\n", buf, version >> 16,
version & 0xffff);
mach_power_off = nf_poweroff;
}
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